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aerugite
Aerugite is a rare complex nickel arsenate mineral with a variably reported formula: Ni9(AsO4)2AsO6. It forms green to deep blue-green trigonal crystals. It has a Mohs hardness of 4 and a specific gravity of 5.85 to 5.95. It was first described in 1858 in either the South Terres mine of Cornwall, England or in Erzgebirge, Saxony, Germany. The origin is disputed. The most common occurrence is as an incrustation on furnace walls in which ores are ''roasted''. Its name comes from the Latin word ''aerugo'' for ''copper rust''. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「aerugite」の詳細全文を読む
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